def handle_key(self, event):
# widget-wide key dispatcher
item = self.has_focus()
if not item:
return
insert = self.canvas.index(item, INSERT)
if event.char >= " ":
# printable character
if self.has_selection():
self.canvas.dchars(item, SEL_FIRST, SEL_LAST)
self.canvas.select_clear()
self.canvas.insert(item, "insert", event.char)
self.coordinates.highlight(item)
elif event.keysym == "BackSpace":
if self.has_selection():
self.canvas.dchars(item, SEL_FIRST, SEL_LAST)
self.canvas.select_clear()
else:
if insert > 0:
self.canvas.dchars(item, insert-1, insert)
Coordinates.highlight(item)
# navigation
elif event.keysym == "Home":
self.canvas.icursor(item, 0)
self.canvas.select_clear()
elif event.keysym == "End":
self.canvas.icursor(item, END)
self.canvas.select_clear()
elif event.keysym == "Right":
self.canvas.icursor(item, insert+1)
self.canvas.select_clear()
elif event.keysym == "Left":
self.canvas.icursor(item, insert-1)
self.canvas.select_clear()
elif event.keysym == "Return":
self.canvas.insert(item, insert, '\n')
self.canvas.select_clear()
else:
pass # print event.keysym
class Writer():
CURRENT_COLOR = "black"
##
# Funcao init
# @param canvas : canvas where to write
#
def __init__(self, canvas):
self.canvas = canvas
self.coordinates = Coordinates(self.canvas)
##
# Faze binding entre botoes e funcaos
#
def addEvents(self):
self.canvas.bind("<Double-Button-1>", self.set_focus)
self.canvas.bind("<1>", self.set_cursor)
self.canvas.bind("<Key>", self.handle_key)
##
# Has the canvas the focus?
# @return true if object has focus or false if not
def has_focus(self):
return self.canvas.focus()
##
# Has the canvas the selection?
# @return true if object has selection or false if not
def has_selection(self):
# hack to work around bug in Tkinter 1.101 (Python 1.5.1)
return self.canvas.tk.call(self.canvas._w, 'select', 'item')
##
# Set the focus on the canvas
# @param event : Tk event
def set_focus(self, event):
self.set_cursor(event)
(x,y) = self.coordinates.coordenadas()
self.canvas.create_text(x, y,text=' ',fill=self.CURRENT_COLOR)
if self.canvas.type(CURRENT) != "text":
return
self.coordinates.highlight(CURRENT)
# move focus to item
self.canvas.focus_set() # move focus to canvas
self.canvas.focus(CURRENT) # set focus to text item
self.canvas.select_from(CURRENT, 0)
self.canvas.select_to(CURRENT, END)
##
# Set the cursor on the item
# @param event : Tk event
def set_cursor(self,event):
# move insertion cursor
item = self.has_focus()
if not item:
self.canvas.select_clear()
return # or do something else
# translate to the canvas coordinate system
x = self.canvas.canvasx(event.x)
y = self.canvas.canvasy(event.y)
self.canvas.icursor(item, "@%d,%d" % (x, y))
self.canvas.select_clear()
##
# Keys handler
# @param event : Tk event
def handle_key(self, event):
# widget-wide key dispatcher
item = self.has_focus()
if not item:
return
insert = self.canvas.index(item, INSERT)
if event.char >= " ":
# printable character
if self.has_selection():
self.canvas.dchars(item, SEL_FIRST, SEL_LAST)
self.canvas.select_clear()
self.canvas.insert(item, "insert", event.char)
self.coordinates.highlight(item)
elif event.keysym == "BackSpace":
if self.has_selection():
self.canvas.dchars(item, SEL_FIRST, SEL_LAST)
self.canvas.select_clear()
else:
if insert > 0:
self.canvas.dchars(item, insert-1, insert)
Coordinates.highlight(item)
# navigation
elif event.keysym == "Home":
self.canvas.icursor(item, 0)
self.canvas.select_clear()
elif event.keysym == "End":
self.canvas.icursor(item, END)
self.canvas.select_clear()
elif event.keysym == "Right":
self.canvas.icursor(item, insert+1)
self.canvas.select_clear()
elif event.keysym == "Left":
self.canvas.icursor(item, insert-1)
self.canvas.select_clear()
elif event.keysym == "Return":
self.canvas.insert(item, insert, '\n')
self.canvas.select_clear()
else:
pass # print event.keysym
class Selector():
##
# Funcao init
# @param canvas : canvas where to write
#
def __init__(self, canvas):
self.canvas = canvas
self.coordinates = Coordinates(self.canvas)
##
# Faze binding entre botoes e funcaos
#
def addEvents(self):
self.canvas.bind("<KeyPress-Delete>", self.delete)
self.canvas.bind("<1>", self.selecionaItem)
self.canvas.bind('<B1-Motion>',self.trataItem)
self.canvas.bind('<ButtonRelease-1>',self.selecionaItem)
self.canvas.bind('<Motion>',self.rescaleCursor)
##
# Delete the selected item
# @param event : Tk event
def delete(self,event):
item = CURRENT
self.coordinates.deleta_caixa_selecao()
if item:
self.canvas.delete(item)
##
# Select the item and add an bounding rectangle
# @param event : Tk event
def selecionaItem(self,event):
if self.canvas.type(CURRENT) != None:
self.coordinates.highlight(CURRENT)
##
# Put the focus on the canvas
# @param event : Tk event
def trataItem(self,event):
corners = ["highlightTR","highlightTL","highlightBR","highlightBL"]
if self.canvas.type(CURRENT) == None or self.canvas.gettags(CURRENT)[0] in corners:
print(self.canvas.gettags(CURRENT)[0])
return
item = CURRENT
if item:
if self.canvas.type(CURRENT) != 'image':
(x1,y1,x2,y2) = self.canvas.coords(item)
x = x1+int((x2-x1)/2)
y = y1+int((y2-y1)/2)
else:
(x,y) = self.canvas.coords(item)
self.move(event,item,x,y)
#self.dimensiona(event,item,x,y)
# move focus to item
self.canvas.focus_set() # move focus to canvas
self.canvas.focus(CURRENT) # set focus to text item
##
# Change the cursor icon if point one of the selection corner
# @param event : Tk event
def rescaleCursor(self,event):
if self.canvas.type(CURRENT) == None:
return
item=CURRENT
if item:
if "highlightTR" in self.canvas.gettags(item):
cursor='top_right_corner'
elif "highlightTL" in self.canvas.gettags(item):
cursor='top_left_corner'
elif "highlightBR" in self.canvas.gettags(item):
cursor='bottom_right_corner'
elif "highlightBL" in self.canvas.gettags(item):
cursor='bottom_left_corner'
else:
cursor='arrow'
self.canvas.config(cursor=cursor)
##
# move the selected item to the new coordonates x and y
# @param item : item to move
# @param x1 : new x
# @param y1 : new y
def move(self,event,item,x1,y1):
x2 = self.canvas.canvasx(event.x)
y2 = self.canvas.canvasy(event.y)
self.canvas.move(item,x2-x1,y2-y1)